Maybe in some cross sectional or cohort studies with poor adjustment models we might see such a signal? Several states of poor health drive LDL down because of those diseases (e.g. having cancer can result in lower LDL, having a heart attack can massively lower LDL), so if we look at study designs that don’t take this into consideration, it can appear that high LDL is protective because of reverse causation.

However, I’m not aware of any evidence that takes this into account showing higher LDL associated with lower ACM. What’s your evidence for such a claim?